Accession Number:

ADD002214

Title:

FFT Processor Utilizing Variable Length Shift Registers.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s):

• Chwastyk,Adolph M.

Report Date:

1974-01-01

Pagination or Media Count:

12.0

Abstract:

The patent relates to a processor for radar and multichannel sonar spectral analysis of band-limited input signals based on a shift register implementation of a fast Fourier transform algorithm coupled with a single flow-through arithmetic unit. Speed is obtained by using an organization that performs the rapid data reordering required for execution of the algorithm. A post-processing unit is used to increase the quality of estimation of line spectra in statistically short term spectra. The unit can be used either as an integrator or as a first order recursive filter. The post-processing unit is implemented in a flowing point format to maintain the dynamic range.

Descriptors:

• *Data processing equipment
• *Patents
• Spectrum analyzers
• Shift registers
• Fourier transformation
• Algorithms
• Sonar signals
• Radar signals
• Power spectra
• Signal processing

Subject Categories:

• Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE